在Betula platyphylla Suk. 的冷反应C重复结合因子. 积极调节寒冷耐受性的情况
Xiang Zhang1, Jiajie Yu1, Guanzheng Qu1
1State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, Heilongjiang, China.
概括
木C重复结合因子 (CBF) 通过调节基因和与蛋白质相互作用来增强耐寒性. 树植物中BpCBFs的过度表达改善了对寒冷压力的代谢反应,为树木的改善提供了洞察力.
科学领域:
- 植物分子生物学 植物分子生物学
- 无生物应激反应应激反应
- 森林遗传学 森林遗传学
背景情况:
- 寒冷压力显著限制了植物的生长和发育.
- C-重复结合因子 (CBF) 转录因子是众所周知的各种植物物种寒冷反应的调节者.
- 在树 (Betula platyphylla Suk.) 中CBF的具体作用. 仍然在很大程度上没有表征.
研究的目的:
- 研究树中CBF转录因子的生物功能和分子机制.
- 确定BpCBFs在提高树植物耐寒性的作用.
- 确定BpCBFs的监管目标和相互作用蛋白.
主要方法:
- 克隆了五个对寒冷反应的BpCBF基因.
- 原生质转化和酵母单杂交试验以确定局部化和DNA结合活性.
- 在树植物中BpCBFs的过度表达和抑制,代谢分析,酵母两杂交试验和体内验证.
主要成果:
- BpCBF7定位在核中,并与BpERF1.1.1.的促进体中的CRT/DRE元素结合.
- 过度表达BpCBFs增强了耐寒性,由减少ROS积累和增加抗氧化酶活性和保护性物质水平证明.
- BpCBF7直接调节了BpERF5和BpZAT10的表达,BpWRKY17被确定为一种相互作用的蛋白质.
结论:
- BpCBFs在提高树植物的耐寒性方面发挥着积极的作用.
- 该机制涉及下游目标和蛋白质-蛋白质相互作用的直接基因调节.
- 这项研究为森林树木对抗非生物压力的遗传改进提供了宝贵的见解.
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